850 T5 code reading and exhaust leak
Discussion
Hi all me again.
Thinking of having car looked at so codes can be read to find why Check Light is on again/still.
Had cleaned up ICV and throttle body a month ago and runs lovely. New plugs etc too.
However, Engine Check Light on all the time now. I think the exhaust is blowing near the cat, but if it is this will that cause the light to be on?
Getting fed up of fiddling about with things thinking I've solved problem when something else goes amiss causing light to be on. I know this is how it can be with cars but it is too cold to be farting about again.
Cracking car but I don't want to chuck money at a new exhaust and STILL the light is on afterwards!
Couple of questions;
1-Does a new exhaust come with new 02 sensors?
2-Would a blowing exhaust cause Engine Check Light to come on?
I did disconnect battery for about 36 hours and still on, though that may well be down to exhaust…also sometimes have a return of slight misfire at higher revs, though this seems to be petrol related, but what do I know?
Looked online and can buy a reader but thought I'd ask here first. It is OBD2 fitted. Live in Northants so anyone suggest anyone then great. Thanks in advance.
Thinking of having car looked at so codes can be read to find why Check Light is on again/still.
Had cleaned up ICV and throttle body a month ago and runs lovely. New plugs etc too.
However, Engine Check Light on all the time now. I think the exhaust is blowing near the cat, but if it is this will that cause the light to be on?
Getting fed up of fiddling about with things thinking I've solved problem when something else goes amiss causing light to be on. I know this is how it can be with cars but it is too cold to be farting about again.
Cracking car but I don't want to chuck money at a new exhaust and STILL the light is on afterwards!
Couple of questions;
1-Does a new exhaust come with new 02 sensors?
2-Would a blowing exhaust cause Engine Check Light to come on?
I did disconnect battery for about 36 hours and still on, though that may well be down to exhaust…also sometimes have a return of slight misfire at higher revs, though this seems to be petrol related, but what do I know?
Looked online and can buy a reader but thought I'd ask here first. It is OBD2 fitted. Live in Northants so anyone suggest anyone then great. Thanks in advance.
What year is the car? if it's too old (pre 96 I think), most readers won't touch it.
An exhaust blow could cause the MIL but so can a knackered cat or dodgy O2 sensor.
The exhausts don't come with replacement sensor as the sensors are mounted in the downpipe/cat assembly.
Replacement downpipes don't come with a sensor either.
An exhaust blow could cause the MIL but so can a knackered cat or dodgy O2 sensor.
The exhausts don't come with replacement sensor as the sensors are mounted in the downpipe/cat assembly.
Replacement downpipes don't come with a sensor either.
martinrpeachey said:
What year is the car? if it's too old (pre 96 I think), most readers won't touch it.
An exhaust blow could cause the MIL but so can a knackered cat or dodgy O2 sensor.
The exhausts don't come with replacement sensor as the sensors are mounted in the downpipe/cat assembly.
Replacement downpipes don't come with a sensor either.
Thanks for your reply again. I've posted here before and you've replied then as well. Cheers.An exhaust blow could cause the MIL but so can a knackered cat or dodgy O2 sensor.
The exhausts don't come with replacement sensor as the sensors are mounted in the downpipe/cat assembly.
Replacement downpipes don't come with a sensor either.
Car is a manual 'P' plate 1997 car. Got OBC 2 port near gearstick.
The problem has been intermittent for 18 months. Engine Check light will come on, often after a long journey. The car will smell rich (to me anyway) and appears to use more fuel than normal.
Then after a period of a week or so the light will go out and car will be fine. No smell.
Replaced points/leads/cap and plugs. Cleaned out throttle body, ICV and car actually drives much better.
However, light is on all the time and yesterday was stinking again.
I am inclined to now think 02 sensor as well. But if it is the cat (if/maybe) that is duff it might not be doing it's job therefore making the second 02 sensor have a paddy.
But, if the cat was bust it would have stayed bust, that is why I think an 02 sensor seems more likely. The slightly blowing exhaust could be a red herring?
Again, any input welcome.
Cheers.
BlimeyCharlie said:
Thanks for your reply again. I've posted here before and you've replied then as well. Cheers.
Car is a manual 'P' plate 1997 car. Got OBC 2 port near gearstick.
The problem has been intermittent for 18 months. Engine Check light will come on, often after a long journey. The car will smell rich (to me anyway) and appears to use more fuel than normal.
Then after a period of a week or so the light will go out and car will be fine. No smell.
Replaced points/leads/cap and plugs. Cleaned out throttle body, ICV and car actually drives much better.
However, light is on all the time and yesterday was stinking again.
I am inclined to now think 02 sensor as well. But if it is the cat (if/maybe) that is duff it might not be doing it's job therefore making the second 02 sensor have a paddy.
But, if the cat was bust it would have stayed bust, that is why I think an 02 sensor seems more likely. The slightly blowing exhaust could be a red herring?
Again, any input welcome.
Cheers.
Happy to help, the amount of help I got from the forums when I was putting my ex-plod together was exceptional so it's only right I give something back Car is a manual 'P' plate 1997 car. Got OBC 2 port near gearstick.
The problem has been intermittent for 18 months. Engine Check light will come on, often after a long journey. The car will smell rich (to me anyway) and appears to use more fuel than normal.
Then after a period of a week or so the light will go out and car will be fine. No smell.
Replaced points/leads/cap and plugs. Cleaned out throttle body, ICV and car actually drives much better.
However, light is on all the time and yesterday was stinking again.
I am inclined to now think 02 sensor as well. But if it is the cat (if/maybe) that is duff it might not be doing it's job therefore making the second 02 sensor have a paddy.
But, if the cat was bust it would have stayed bust, that is why I think an 02 sensor seems more likely. The slightly blowing exhaust could be a red herring?
Again, any input welcome.
Cheers.
I'd say it's the O2 sensor then mate. It'll make the car run rich as a safety precaution (you don't want it running lean)
These guys are pretty good... http://www.partsforvolvosonline.com
A generic reader will most likely be able to diagnose which (if you have more than one) O2 sensor is at fault.
Thanks for that again and well said about helping out.
I asked a couple of garages today and I'd rather persevere myself in reading codes.
Just get a bit fed up felling like I'm chasing my tail. It would be nice to have it running 100% but it would if I wasn't so tight…
Enjoy learning new things but at the same time not very patient either. Great car though, and have become a bit attached, as it is really well put together and I like the design, which being a BMW fan thought I'd never say.
Will post on here tomorrow no doubt when looked into code readers. Thanks again.
I asked a couple of garages today and I'd rather persevere myself in reading codes.
Just get a bit fed up felling like I'm chasing my tail. It would be nice to have it running 100% but it would if I wasn't so tight…
Enjoy learning new things but at the same time not very patient either. Great car though, and have become a bit attached, as it is really well put together and I like the design, which being a BMW fan thought I'd never say.
Will post on here tomorrow no doubt when looked into code readers. Thanks again.
BlimeyCharlie said:
Thanks for that again and well said about helping out.
I asked a couple of garages today and I'd rather persevere myself in reading codes.
Just get a bit fed up felling like I'm chasing my tail. It would be nice to have it running 100% but it would if I wasn't so tight…
Enjoy learning new things but at the same time not very patient either. Great car though, and have become a bit attached, as it is really well put together and I like the design, which being a BMW fan thought I'd never say.
Will post on here tomorrow no doubt when looked into code readers. Thanks again.
If you have an android phone, for about £3.50 there's the Torque app which is brilliant, not just for reading and clearing generic codes but for live data, logging, even track timing with video/data overlay. All you need is a bluetooth OBD unit for about £10 and you're away.I asked a couple of garages today and I'd rather persevere myself in reading codes.
Just get a bit fed up felling like I'm chasing my tail. It would be nice to have it running 100% but it would if I wasn't so tight…
Enjoy learning new things but at the same time not very patient either. Great car though, and have become a bit attached, as it is really well put together and I like the design, which being a BMW fan thought I'd never say.
Will post on here tomorrow no doubt when looked into code readers. Thanks again.
I've hopefully mended the blowing exhaust today and a few other bits and bobs. Looked at all hoses to check for leaks as well. None found.
Disconnected battery so will see if that makes Check Engine light go away.
Probably won't but squirted wd40 on 02 sensors anyway incase they need to come out. Couldn't get them to budge so left them alone.
I'll update as and when, but I'll post a new topic up anyway to do with fault code reading via app.
Disconnected battery so will see if that makes Check Engine light go away.
Probably won't but squirted wd40 on 02 sensors anyway incase they need to come out. Couldn't get them to budge so left them alone.
I'll update as and when, but I'll post a new topic up anyway to do with fault code reading via app.
RESULT!
Check Engine Light went out today, approx' 100 miles after exhaust repair.
I did read (here I believe-thanks again) that even if I had a new 02 sensor fitted, it can take a while for The Light to go out.
Figured I'd run the car as normal, as see if it went out, fully expecting it not to, and would then have to have new sensor.
So I can report that there was a hole in the top of exhaust, where it joins back box, and this was enough to trigger the 02 sensor in the down pipe before the CAT.
As stated previously, my car has just the single 02 sensor.
At the end of day, the car was saying something was not right, so did its job.
I did take it to my semi regular garage, and they fixed the exhaust, but looking at their work they repaired it in one place, and missed the top hole, which is one of those things.
Hope this helps other people in the future. I bought the exhaust repair stuff from a builders merchant. It is the stuff you'd use around a fire (heat resistant) and cost £2.85 for a tube of it that you apply with a silicone gun.
Much cheaper than new exhaust, code reading, 02 sensor and fitting, which I think would have cost me £400-£500.
Thanks to Martin for his help, as that made me able to eliminate things one by one.
Check Engine Light went out today, approx' 100 miles after exhaust repair.
I did read (here I believe-thanks again) that even if I had a new 02 sensor fitted, it can take a while for The Light to go out.
Figured I'd run the car as normal, as see if it went out, fully expecting it not to, and would then have to have new sensor.
So I can report that there was a hole in the top of exhaust, where it joins back box, and this was enough to trigger the 02 sensor in the down pipe before the CAT.
As stated previously, my car has just the single 02 sensor.
At the end of day, the car was saying something was not right, so did its job.
I did take it to my semi regular garage, and they fixed the exhaust, but looking at their work they repaired it in one place, and missed the top hole, which is one of those things.
Hope this helps other people in the future. I bought the exhaust repair stuff from a builders merchant. It is the stuff you'd use around a fire (heat resistant) and cost £2.85 for a tube of it that you apply with a silicone gun.
Much cheaper than new exhaust, code reading, 02 sensor and fitting, which I think would have cost me £400-£500.
Thanks to Martin for his help, as that made me able to eliminate things one by one.
Gassing Station | Volvo & Polestar | Top of Page | What's New | My Stuff